Nanotechnology Now

Our NanoNews Digest Sponsors





Heifer International

Wikipedia Affiliate Button


android tablet pc

Home > Press > Changing the dynamics of bulk materials

The front cover image represents the 3-D structure of a new polymer-derived nanographene bulk material that consists of a 3-D network of single-layer graphene nanoplatelets. The material is mechanically robust and combines a graphene-like surface area with an open macroporosity thus allowing one to dynamically control its macroscopic properties through ion-induced interfacial electric fields.
The front cover image represents the 3-D structure of a new polymer-derived nanographene bulk material that consists of a 3-D network of single-layer graphene nanoplatelets. The material is mechanically robust and combines a graphene-like surface area with an open macroporosity thus allowing one to dynamically control its macroscopic properties through ion-induced interfacial electric fields.

Abstract:
Lawrence Livermore researchers have developed a new bulk material whose physical properties can be dynamically changed by an external signal.

Changing the dynamics of bulk materials

Livermore, CA | Posted on October 9th, 2012

The scientists came up with a method to fabricate mass-producible graphene-based bulk materials from low-cost polymer-derived carbon foams by selectively removing carbon atoms from a network composed of both unstructured carbon and graphite nanoplatelets.

"The new technique is inexpensive, scalable, and yields mechanically robust, centimeter-sized monolithic samples that are composed almost entirely of interconnected networks of single-layer graphene nanoplatelets" said Ted Baumann of Lawrence Livermore who developed the synthetic approach.

These graphene bulk materials have an ultra-high surface area and may thus be used for energy storage systems such as super-capacitors where energy is stored by polarization of the graphene electrode/electrolyte interface.

Graphene bulk material also could be used as an electrically conductive network to support the active material in battery applications. Desalination using capacitive desalination is another emerging field.

The advantage of using bulk materials versus composite materials (made from porous carbon particles and a binder) is their superior stability, which allows for longer lifetimes, higher conductivity (less losses during charging and discharging), and the ability to tune the pore structure.

"This is a potentially game changing concept in materials science," said Juergen Biener, lead LLNL author of the cover article in the Sept. 24 issue of the journal, Advanced Materials. "Just imagine what you could do with a bulk material with properties you can change dynamically by an external variable. For example, you could switch a bulk material dynamically between a conductive and an insulating state."

The specific surface area of this 3-dimensional nanographene bulk material is comparable to that of a free-standing graphene layer, but it has an open porosity that allows rapid mass transport through the material.

Most graphene based bulk materials are made by self-assembly of graphene oxide, which is still very expensive and costs up to several hundred dolloars per gram. At this price, it is not economical to use graphene based bulk materials for energy storage even though they have excellent properties for this application. Biener said. By contrast, the Livermore technique of making graphene based bulk materials is inherently inexpensive (only a few dollars per kilogram), scalable, and yields mechanically robust, centimeter-sized monolithic samples. "That is a major breakthrough toward applications," Biener said.

The group has tested the new technique by making large pieces of the material, and tested actuator and the tunable resistor applications.

Other Livermore researchers include Marcus Worsely, Arne Wittstock, Jonathan Lee, Monika Biener, Christine Orme, Sergei Kucheyev, Brandon Wood, Trevor Willey and Alex Hamza.

Other institutions include the Karlsruhe Institute of Technology, Technische Universität Darmstadt, and Technische Universitat Hamburg-Harburg.

####

About Lawrence Livermore National Laboratory
Founded in 1952, Lawrence Livermore National Laboratory provides solutions to our nation's most important national security challenges through innovative science, engineering and technology. Lawrence Livermore National Laboratory is managed by Lawrence Livermore National Security, LLC for the U.S. Department of Energy's National Nuclear Security Administration.

For more information, please click here

Contacts:
Anne M Stark
LLNL
(925) 422-9799

Copyright © Lawrence Livermore National Laboratory

If you have a comment, please Contact us.

Issuers of news releases, not 7th Wave, Inc. or Nanotechnology Now, are solely responsible for the accuracy of the content.

Bookmark:
Delicious Digg Newsvine Google Yahoo Reddit Magnoliacom Furl Facebook

Related News Press

News and information

Study finds long-term survival of human neural stem cells transplanted into primate brain April 23rd, 2014

High-Performance, Low-Cost Ultracapacitors Built with Graphene and Carbon Nanotubes: Future devices based on technology could bridge gap between batteries and conventional capacitors in portable electronics and hybrid electric vehicles April 23rd, 2014

Guo Lab Shows Potential of RNA as Heat-resistant Polymer Material for Nanoarchitectures April 23rd, 2014

National Space Society Congratulates SpaceX on the Success of CRS-3 and the First Flight of the Falcon 9R April 22nd, 2014

Nanoreporters tell 'sour' oil from 'sweet': Rice University's hydrogen sulfide nanoreporters gather intel on oil before pumping April 22nd, 2014

Graphene

High-Performance, Low-Cost Ultracapacitors Built with Graphene and Carbon Nanotubes: Future devices based on technology could bridge gap between batteries and conventional capacitors in portable electronics and hybrid electric vehicles April 23rd, 2014

Nanomaterial Outsmarts Ions April 22nd, 2014

Thinnest feasible membrane produced April 17th, 2014

Laboratories

Berkeley Lab Researchers Demonstrate First Size-based Chromatography Technique for the Study of Living Cells April 22nd, 2014

Govt.-Legislation/Regulation/Funding/Policy

High-Performance, Low-Cost Ultracapacitors Built with Graphene and Carbon Nanotubes: Future devices based on technology could bridge gap between batteries and conventional capacitors in portable electronics and hybrid electric vehicles April 23rd, 2014

Guo Lab Shows Potential of RNA as Heat-resistant Polymer Material for Nanoarchitectures April 23rd, 2014

Cloaked DNA nanodevices survive pilot mission: Successful foray opens door to virus-like DNA nanodevices that could diagnose diseased tissues and manufacture drugs to treat them April 22nd, 2014

Berkeley Lab Researchers Demonstrate First Size-based Chromatography Technique for the Study of Living Cells April 22nd, 2014

Chip Technology

Harris & Harris Group Notes the Receipt of Proceeds From the Sale of Molecular Imprints' Semiconductor Business to Canon April 22nd, 2014

Progress made in developing nanoscale electronics: New research directs charges through single molecules April 21st, 2014

'Exotic' material is like a switch when super thin April 18th, 2014

Scientists open door to better solar cells, superconductors and hard-drives: Research enhances understanding of materials interfaces April 14th, 2014

Materials/Metamaterials

Guo Lab Shows Potential of RNA as Heat-resistant Polymer Material for Nanoarchitectures April 23rd, 2014

Nanomaterial Outsmarts Ions April 22nd, 2014

Thinnest feasible membrane produced April 17th, 2014

INSCX™ exchange to present Exchange trade reporting mechanism for engineered nanomaterials (NMs) to UK regulation agencies, insurers and upstream/downstream users April 17th, 2014

Announcements

Study finds long-term survival of human neural stem cells transplanted into primate brain April 23rd, 2014

High-Performance, Low-Cost Ultracapacitors Built with Graphene and Carbon Nanotubes: Future devices based on technology could bridge gap between batteries and conventional capacitors in portable electronics and hybrid electric vehicles April 23rd, 2014

Guo Lab Shows Potential of RNA as Heat-resistant Polymer Material for Nanoarchitectures April 23rd, 2014

National Space Society Congratulates SpaceX on the Success of CRS-3 and the First Flight of the Falcon 9R April 22nd, 2014

Industrial

Vacuum Ultraviolet Lamp of the Future Created in Japan: First Solid-State Vacuum UV Phosphor, Described in APL-Materials, Promises Smaller, Safer, Longer Lasting, Low Power Lamps for Industrial Applications April 22nd, 2014

Shiny quantum dots brighten future of solar cells: Photovoltaic solar-panel windows could be next for your house April 14th, 2014

Industrial Nanotech, Inc. Lands First Major Order from Pemex, Mexico’s State-Owned Oil and Gas Company April 14th, 2014

Industrial Nanotech, Inc. Announces Certification for Use in Middle East for Buildings: Nansulate(R) Energy Saving Coatings to be used by Major Middle East Energy Company April 1st, 2014

Battery Technology/Capacitors/Generators/Piezoelectrics/Thermoelectrics

High-Performance, Low-Cost Ultracapacitors Built with Graphene and Carbon Nanotubes: Future devices based on technology could bridge gap between batteries and conventional capacitors in portable electronics and hybrid electric vehicles April 23rd, 2014

Transparent Conductive Films and Sensors Are Hot Segments in Printed Electronics: Start-ups in these fields show above-average momentum, while companies working on emissive displays such as OLED are fading, Lux Research says April 17th, 2014

Relieving electric vehicle range anxiety with improved batteries: Lithium-sulfur batteries last longer with nanomaterial-packed cathode April 16th, 2014

Catching the (Invisible) Wave: UC Santa Barbara researchers create a unique semiconductor that manipulates light in the invisible infrared/terahertz range, paving the way for new and enhanced applications April 11th, 2014

NanoNews-Digest
The latest news from around the world, FREE







  Premium Products
NanoNews-Custom
Only the news you want to read!
 Learn More
NanoTech-Transfer
University Technology Transfer & Patents
 Learn More
NanoStrategies
Full-service, expert consulting
 Learn More














ASP
Nanotechnology Now Featured Books




NNN

The Hunger Project







© Copyright 1999-2014 7th Wave, Inc. All Rights Reserved PRIVACY POLICY :: CONTACT US :: STATS :: SITE MAP :: ADVERTISE